Starting and stopping mechanism.



A. E. JBRRAM. STARTING AND STOPPING MECHANISM.

, APPLIGATION FILED JAN. 2, 19 08 Patented Jan. 12, 1915.

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Ail THUR E. JERRAM, F Lamas-res, nivennlvn, nssienon T0 UNITED-SHOE MA- v HINERY COMPANY, or PA'rnRsoN, NEW messy, "A CORPORATION or new JERSEY.

" s'rnm rive AND strorrme MECHANISM.

'raameeo.

Patented Jan. 12, 1915.

Application fi led January 2, 1908. Serial No. 408,941.

- Leicester, in the county of Leicester, England, have invented certain Improvements in Starting and StoppingMechamsms, of

which the following description, connection with the accompanying drawings, is

a specification, like reference, characters on the drawings indicating like parts in the several figures.

, This invention relates to improvementsv in clutches of that type in which a clutch member is arranged to turn with a shaft on which it is mounted and also to be moved longitudinally of said shaft into engagement with a driving pulley for transmitting the motion of said pulley to said shaft.

Clutches of thischaracter are frequently used in cases where it is desired to have the shaft stop always in the same position in its revolution so that parts which are operated.

from cams or eccentrics mounted on said shaft may stop at definite point in their various cycles of mo ement. To this end, it is common in clutchesof the above class to provide a brake member fixed in position, with which the clutch member engages when it is moved out of contact with the driving pulley and-which serves-to stop the rotation of the shaft on which the clutch'memher is mounted instantly when the clutch member is brought in contacttherewith; and also to provide a cam mounted on the main shaft, and acting to throw the clutch member out of contactwith'the pulley and into engagement with the brake member only at a certain point in the revolution of sai d. shaft.

One feature of this invention is the provision of means for avoiding the necessity of providing a separatecam 0n the sha of the machine to perform the operation above stated. Preferably a part of the clutch member itself may be utilized as the cam, thus greatly simplifying the construction of the starting and stopping mechanism and removing one source of possible weakness by rendering it unnecessary to provide separate connections between the clutch member and cam.

Another feature of the invention is the use. in a device such as above described, of novel means acting to render the cam formed on the clutch member inefliect ve to move said clutch member except as desired.- This action 18 especially advantageous in cases where it is convenient to have the main shaft 'Inaliemore than one rotation before stoppin Still another feature of this invention relates to the provision of simple and easily accessible means for varying the point in the rotation of the shaft at which the clutch pulley is moved out of engagement with the drivingpulley, thus bringing the said shaft to rest, Preferably this means will be so arranged as to permit adjustment without disturbance or derangement of the other parts of the mechanism.

Other features of the invention are the provision of a starting and stopping mecha-,

I nism which is distinguished by geese and convenience in assembling the same and in which the entire mechanism is supported on a single shaft of the machine in such a manner that it is possible to remove or adjust the pulley without interfering with the other parts of the mechanism. l

The above and other objects, as will hereinafter appear are obtained in the preferred construction hereinafter described, by pro viding the clutch member with a/ cam surface or groove obliquely disposed to its axis of rotation, which camsurface' or groove is engaged directly or indirectly at separate points on a line located at one side of said axis by the two 'armsof a fork or equivalent device, the construction being such that rotation of the clutch member imparts to the arms a movement of oscillation about a point located between them as well as a movement of translation together longitudinally of said axis. The fork is journaled in asocket to permit its arms to oscillate as above described and the socket is movably supported so as to permit the arms of the fork to have the movement of translation together. So long as the arms are permitted to have such movement of translation they will not act. to move the clutch member which is then maintained in contact with the driving pulley by suitable springs, but if the arms of the fork are prevented from moving together longitudinally, of the axis of rotation of the clutch member the action of said cam surface thereon will cause the clutch member to be forced away from the driving pulley. Accordingly suitable means .are' provided which are under the control of the operator whereby he can prevent such movement of translation of the arms of the fork and thereby cause the machine'to be stopped, or by permitting the arms to have "such movement he may allow the springs to move the clutch member into contact with the driving. pulley to start the machine.

' Other features of the invention will be apparent from the following description of a preferred embodiment thereof selected for purposes, of illustration and shown in the r and stopping mechanism embodying this invention and showing the actuating 'connec' tiontherefor; Fig. 2 is a central horizontal accompanying drawings, in which,-

Figure l-is a side elevation of a starting section; and Fig. 3 is a detail showing the clutch member in. elevation and a, part of the pulley and brake member in section.

4 The starting and stopping mechanism comprises a drivingpulley 112 mounted to turn loosely on an axis coinciding with that of. main shaft '4, and preferably adjustable relatively to said main shaft as by being mounted .on a flanged bushing 116 screwed upon aredu ced screw threaded portion of said shaft. Said pulley may be retained in I position on said bushing by a flanged'sleeve 18; screwed into said bushing, a lock jnut 12'Q'fscrewing into said sleeve. 118 and bear:

ing against the end of shaft 4, serving toretain the parts in adjusted position. I

v A brake member 110 is mounted upon the frame of the. machine and the clutch memher 114ismountedup0n shaft 4 between said brake member and pulley so as tobe movable into engagement with one or the other of said elements, a facing of leather or fiber being preferably applied to the engaging surfaces of some or all of said elements to increase the efficiency of such engagement. Clutch member 114 is shown as splined upon a sleeve 122 which is fixed on the main shaft and has flan es 124, 125 one or both of which maybe adyusted relatively to said sleeve and longitudinally of shaft 4 to vary the: limits of movement of said clutch member in either direction.

To, secure a compact construction the sleeve 122 may berecessed at each end to permit the hubs of the driving pulley 112,

' and of the brake member 110 to extend thereunder. One or more springs 126 mounted between clutch member 114 and flange 1241,31 sleeve 122 tend to move said clutch member to its limit of movement in contact with the other flange 125 and the arrangement will preferably be such that said springs will tend to force the clutch member into contact with the pulley to actuate the shaft 4.

{To move the clutch member 114 in the opposite direction against the tension of springs 126, a forked lever 130 ispivotally connected therewith as by means of a cam thus stopping the machine.

together to form a toggle.

groove formed insaidclutch member on r a plane which is inclined with relationv to the'axis of the main shaft, and rin'g.seg-' ments (Figs. 1 and 2) or cam rollers 131 (Fig' 3) engaging said cam groove l 28. and mounted on the forked portion of said lever 130 by means of studs 133 screwed into the ends of said lever and provided with plane portions extending into holes formed in said segments. a The aXis of the said pivotal connection between the forked lever 130 and. the clutch member 114 is so disposed that it does. not intersect the axis of main shaft 4 but is situated a little below or to one sidethereof. The shank of the forked lever 130 is rounded and is. journaled in a pendent lever 134 pivoted at 137, as, for example, to an-extension from. the frame of the machine. The above constructionand arrangement is such that during the rotation of the'clutch member 114 the forked lever 130 will be oscillated about the axis of its shank by coactionbetwee'n the Walls of cam groove 128 andthe ring segments 132 carried by the forks of said lever. Moreover, as the axis of the pivotal connection between the forked lever-and clutch mechanism does not intersect the axis of the main shaft the firstnamed axis will have a, motion of transla tion longitudinally of the main shaft in addition to itsoscillating movement and this motion of translation will cause forked lever it is disengaged from driving pulley 112 and forced into contact with brake member 110, A preferred means for stopping the'vibration of lever 134 is illustrated in Fig. 1 and comprises a pair of links 135 and 136 pivoted to lever 130 and pendent lever 134 to vibrate about i 134 and some fixed point, such as the frame of the machine respectively and connected A rod 138 extending from'a treadle or the likeis provided with a fixed collar 140 for straightening the toggle and amovable collar 142 for breaking the toggle, a spring 143 being provided between said collar 142 and a third collar fixed on rod 138 for taking up the motion of said toggle due to the vibrations of lever 134 when the toggle is broken. -Rod 138 is normally held in a position to straighten the toggle and stop the oscillations of lever 134 as by a spring 144.

, the treadle is held down said. shaft will be mat nee rotated and forked lever 130 will be oscillated about the axis. of its shank which is journaled in pendent lever 134 and at the same time said lever 134 will be given a movement longitudinally of shaft 4 due. to the movement longitudinally. ofysaid shaft of the line connecting the pivotal points of 2 connection. of, lever 130 and clutch member 114. As will be-readily understood, the es cillation of lever 130 about the-axis ofits shank isan idle mo.vement and without effect on the position ofthe clutch member, and the vibration of lever 134 011 its pivot 137 is alsowithout effect OIIYthBPOSitiGIIiOf' said. clutch member so; long as: it is perimitted to take place. When, however, the toggle is straightened and lever 134 is held against vibration, clutoh'member 114", as'it rotates, is caused by .the inclination of groove 128to move out of contact with pulley 112: and; into contact with brake 110, thereby stoppin its own rotation and the rotation of sha t 4 at the desired point", in such rotation. For purpose of adjustment as to vary the point in, the cycleof opera tions. at which the machine is stopped, the

pivot of" lever 134 is formed" eccentricallly: upon its supporting stud 137 so that by reta tably, adjusting. the'studin its bearings the position. of the pivotjcan be shifted thus varying, the point inthe rotation of; the shaft, at which the clutch member is moved out of contact with the pulley; The stud can be secured in adjusted position by a bolt 145. In taking this mechanism apart for purposes of inspection or repairs, lock nut 120 will'first be loosened when saidnut and sleeve 118 may be removed. together. This releases pulleyi 112 which cannow be removed without interfering or deranging the other parts of the clutch. If it should be desired to remove the clutch member also the flanged bushing 116 and flangev 125 would next be removed and studs 133 would be, removed from the ends of the forked arms of pivot 130, thereby releasingthering segments 132 after which the clutch member. 114 can he. slid. off of. its sleeve 122. y I

While; the. starting: and stoppin mechanism hasbeen shown. and. describe as rovided, with a brake mechanism, it is pain thatgthe-brakemember can be omitted withdint interfering with the use of the means herein disclosed" for moving, said clutch member intoand out of engagement with the pulley. It is also plain that other means may be substituted for those herein shown for stopping-the vibration of thepivoted pendent lever 134, that it is not essential' that pulley 112 be supported on anvextension ofshaft 4 itself so long as its axis coincides-with the axis of said shaft, and thatlother. changes can be made in the device disclosed coming within the scope of the following claims. 1

Having described my invention, What I claim as new and desire to secure by Letters Patentiof: the United States is 1. Ina machine of the class described, the

combination with a shaft, of a driving pulley therefor, a clutch member separate from the pulley for. connecting said shaft and pulley, and means for breaking such connec+ tionv for. stopping, the shaft comprisin a continuous obliquely disposed cam sur ace formed on the clutch member itself and a device for engaging said cam surface at separatedscribed;

, 2. In, a mechanism of the class described, the combination witha shaft, of an actuatingpulley therefor, a clutch member movable longitudinally 'of the shaft into engagement with said pulley, and means for 'movmgj said clutch member out of engage ment with the pulley comprising a cam roove formed in send clutch member, a orked lever in engagement with said groove, and means for controlling the movement of the lever. 3. In a mechanism of the class described, the combination with a shaft and a driving pulley: therefor, of a clutch for connecting said pulley and shaft to transmit motion from one to the other, and means acting on said. clutch mechanism. to break such connection between said shaft and pulley comprising a member having a plurality of distinct movements as the shaft is driven by the pulley and means for interrupting certain of said movements.

4. In a mechanism of the class described, the combination with a shaft and a driving pulley therefor, of a clutch member for connecting said pulley and shaft to transmit motion from one to the other, and-means acting on said clutch member to break such connection between the shaft and pulley comprising a member actuated by said clutch member and having a movement longitudinally of said clutch member and means for interrupting such movement.

In a mechanism .of the class described,- the combination with a shaft-and a driving pulley-therefor, of a clutch mechanism for connectingsaid pulley and shaft to transmit points, all substantially as demotion from-one to the other, and means acting on said/clutch mechanism to break such connectio'nfbetween the pulley and shaft comprisinga member havmg a movement longitudinally of said shaft and 'a'nother movement' at an angle --to'thedirection of the first movement and means'for lIltBLlllPt-l ing one ofs aid movements.

- 6. In a mechanism of the class described, the combination with a shaft and a driving pulley therefor, of a clutch mechanism for connecting said' :pulley and shaft to transmit motion from one to the other, and means actihgon saidclutch mechanismflto break s'uchconne'ction betweenthe pulley and shaft comprisinga member having a plurality of.

the combination with a shaft and a drivingpulley therefor, of a clutch mechanism for connecting saidpulley and shaft to transmit motion from one-to the other, and means actingon said clutch mechanism to break such connection between the pulley and shaft comprising a member having a movement of vibration in a plane parallel to the.

axis of said shaft and another movement of oscillation about a part of itself, and means forstopping one of said movements.

8. In a mechanism of the class described, the combination of a shaft, a driving pulley therefor, a clutch mechanism for connecting said pulley and shaft to transmit motion;

from one to the other, a brake, and means for moving one clutch member from the driving pulley to the brake to stop said shaft at a definite point in the rotation of said shaft, comprising a cam surface formed on the clutch member itself and a movable device for engaging said cam surface at separated points,

- '9. In a mechanism of the class described, the combination with a shaft, of an actuating' pulley therefor, a' clutch member movable longitudinally of said shaft into engagement with said pulley to connect'said pulley and shaft for the purpose of transmitting motion from one to the other, and a lever for moving said clutch memberout of engagement with said pulley at a predetermined point in the rotation of the shaft, together with means for bodily shifting said lever to vary the point in the rotation of the shaft at which the pulley and shaft are disconnected. r 1 Y g 10. In a mechanism ofthe class described, the combination with a shaft and a driving pulley therefor, ofa brake member, a clutch member movable alternately into contact with said actuating pulley and brake member for the purpose 0 alternately connecting said actuating pulley'and-shaft to transmit motion fromone-td the-other, and of brealiing such connection to 'stop the shaft, means cooperating'yvith said clutch member whereby-the latteflacts-to move itself out of coirtact with said pulley at: a predetermined point in the rotation of the shaft,'and means acting on said last mentioned mea'nsfor changing'its position relatively. to said clutch member to var Y the oint the rotation of the shaft at which said last-mentioned means becomes operative. Y

- 11. In-a mechanism of theclass'described,

the combination with a shaft, of a member adjustable longitudinally: of said shaft, an

of said shaft, means connecting said pulle 19.0. and shaft to transmit motion'fr'om onente the other, a sleeve on which said pulleygiis mounted, and a flanged bushing threaded into the interior of said sleeve and having a flange serving to retain said pulley 1n position on said sleeve.

13. In a mechanism of the Tclass described;-

the combination with a shaft, of a pulley mounted on an axis coinciding with the axis of'said shaft, means connecting said pulley and sha'ftfor transmitting motion .from one to the other, a sleeve-on which said pulley is mounted, and a flanged bushing threaded into the interior of said sleeve having a flange serving to retain said pulley in po sition on said sleeve,'and a locking screw for; the flanged portion. 1 f

14. In a mechanism of the class-described, the combination with ashfaft, of an' actuating pulley therefor, a clutch'member movable into engagement with said pulley for transmittingmotion between said pulley and shaft, a member connected to said clutch memberfand actuated therefrom, and means for preventing moveinentj-of the last-men tioned member'whereby the clutch is moye'd away from the pulley; N

15. In a mechanism of the class described, the combination of a shaft, an -actuating pulley therefor, a clutch member movable longitudinally of its axis of rotation to connect said pulley and shaft 'for transmitting mot ion from one to the other, saidclutch member havlng a cam groove or surface ob.-

liquely disposed with relation to its axis, a forked-lever engaging with its arms said groove or -surface atseparate points in a line located below or at one side of said axis whereby rotation of the clutch member imparts to the-arm'sa-movement of oscillation about a center located between them as well as a movement of translation in common longitudinally of said axis, and means that 16. In a mechanism of the class described,

a main shaft, an actuating pulley therefor, a clutch member movable'to connect said pulley and shaft for transmitting motion from one to the other, said clutch member having a cam groove. or surface obliquely disposed with relation to its axis, a forked lever having its armeng aging said groove or surface at separate points in a line located below or at one side of Sam axis, a pendent lever pivoted to swing longitudinally of the axis of rotation of said clutch member and having the shank of the said forked lever journa'led therein, and a tog'gleconnecting the lever with a fixed part and adapted to i prevent this motion of the pendent lever, for

breaking the connection between the pulley and shaft. I

17. In a mechanism of the class described the combination withfa shaft and a driving pulley therefor, of a-clutch member for connecting said pulley and shaft to transmit motion from one to the other, a brake for arresting the rotationof said clutch memher, and .a lever vibrated by said clutch member, said lever and clutch member be' so related that when the'moveme'ntof sai lever is interrupted the clutch member shifts v itself fromthe'driving pulley to the brake. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR E. J ERRAM. Witnesses: Y

GRACE HOLES.

- JOHN RIEHABD Law. 

